MESON Chess Problem Database

Problem Display
PID: 28344 (2Q5/5q2/8/2p1PR2/2PPk3/6PP/3K4/8 w - - 0 1)

Palant, SP

Socialicheski Donbass, 1963

2Q5/5q2/8/2p1PR2/2PPk3/6PP/3K4/8

#2

8 + 3

3242 BCPS Rapid Solving (Cheltenham) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Rf4#
    • 1...Qh5
      • 2.Rf4#
    • 1...Qe6
      • 2.Rf4#
    • 1...Qg6
      • 2.Rf4#
    • 1...Qe8
      • 2.Rf4#
    • 1...Qg8
      • 2.Rf4#
    • 1...Qa7
      • 2.Rf4#
    • 1...Qb7
      • 2.Rf4#
    • 1...Qc7
      • 2.Rf4#
    • 1...Qd7
      • 2.Rf4#
    • 1...Qe7
      • 2.Rf4#
    • 1...Qg7
      • 2.Rf4#
    • 1...Qh7
      • 2.Rf4#
  • Tries
    • 1.Rxf7?
      • threat
        • 2.Rf4#
        • 2.Qg4#
      • 1...cxd4
        • 2.Qf5#
      • 1...Kxd4!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg4#
      • 1...Kxd4
        • 2.Qg4#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Qxc4
        • 2.Rf4#
      • 1...Qxg8
        • 2.Rf4#
      • 1...Qxf5
        • 2.Qd5#
      • 1...Qh5
        • 2.Rf4#
      • 1...Qg6
        • 2.Rf4#
      • 1...Qg7
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD,P_PINP(E)::R1(G)
    • Q(c);N_GUARD::R1(G)
  • Tries
    • Try
      • R(G);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);SBLOCK,XP(E)::QAB1(H)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
  • Actual
    • Q(H);
    • Threat
      • QAR2(H)
    • Vars
      • K(a);P-FLIGHT,XP(E)::QAR(H)
      • K(a);S_FLIGHT,XR(G)::QAB1(H)
      • Q(c);N_GUARD,XP(D)::R1(G)
      • Q(c);N_GUARD,XQ(H)::R1(G)
      • Q(c);OGATE,SBLOCK,XR(G)::QAB1(H)
      • Q(c);N_GUARD::R1(G)
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